How to see the output of socket.html?

StackOverflow https://stackoverflow.com/questions/23428223

  •  14-07-2023
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Question

i am newbie to node.js. I was trying to implement danielnill example tutorial

server.js

var http = require("http");
var url = require('url');
var fs = require('fs');
var io = require('socket.io');

var server = http.createServer(function(request, response){
    console.log('Connection');
    var path = url.parse(request.url).pathname;

    switch(path){
        case '/':
            response.writeHead(200, {'Content-Type': 'text/html'});
            response.write('hello world');
            break;
        case 'socket.html':
            fs.readFile(__dirname + path, function(error, data){
                if (error){
                    response.writeHead(404);
                    response.write("opps this doesn't exist - 404");
                }
                else{
                    response.writeHead(200, {"Content-Type": "text/html"});
                    response.write(data, "utf8");
                }
            });
            break;
        default:
            response.writeHead(404);
            response.write("opps this doesn't exist - 404");
            break;
    }
    response.end();
});

server.listen(8001);

io.listen(server);

socket.html

<html>
  <head>
    <script src="/socket.io/socket.io.js"></script>
  </head>
  <body>
    <script>
      var socket = io.connect();
    </script>
    <div>This is our socket.html file</div>
  </body>
</html>

when ever i am trying run this http://localhost:8001/socket.html url from browser. Its goes to default case instead going to 'socket.html' case.

Pls help me to execute 'socket.html' case in this example.

Was it helpful?

Solution

There are two issues with what you have posted:

  1. The path variable equals /socket.html when the URL http://localhost:8001/socket.html is requested, not socket.html; you need to update the case statement accordingly.

  2. The fs.readFile callback will not be able to write the response to back to the client (browser), as response.end(); will have already been called; you need to move response.end() into each of the case statements.

Here is the updated code:

var http = require("http");
var url = require('url');
var fs = require('fs');
var io = require('socket.io');

var server = http.createServer(function(request, response){
    console.log('Connection');
    var path = url.parse(request.url).pathname;

    switch(path){
        case '/':
            response.writeHead(200, {'Content-Type': 'text/html'});
            response.write('hello world');
            response.end();
            break;
        case '/socket.html':
            fs.readFile(__dirname + path, function(error, data){
                if (error){
                    response.writeHead(404);
                    response.write("opps this doesn't exist - 404");
                }
                else{
                    response.writeHead(200, {"Content-Type": "text/html"});
                    response.write(data, "utf8");
                }
                response.end();
            });
            break;
        default:
            response.writeHead(404);
            response.write("opps this doesn't exist - 404");
            response.end();
            break;
    }
});

server.listen(8001);

io.listen(server);
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